perrorのヘルプ・マニュアル

perror --help

perror Ver 2.11, for Linux (x86_64)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Print a description for a system error code or a MySQL error code.
If you want to get the error for a negative error code, you should use
-- before the first error code to tell perror that there was no more options.
Usage: perror [OPTIONS] [ERRORCODE [ERRORCODE...]]
-?, --help Displays this help and exits.
-I, --info Synonym for --help.
-s, --silent Only print the error message.
-v, --verbose Print error code and message (default).
(Defaults to on; use --skip-verbose to disable.)
-V, --version Displays version information and exits.
Variables (--variable-name=value)
and boolean options {FALSE|TRUE} Value (after reading options)
--------------------------------- ----------------------------------------
verbose TRUE

perror Ver 2.11, for Linux (x86_64)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Print a description for a system error code or a MySQL error code.
If you want to get the error for a negative error code, you should use
-- before the first error code to tell perror that there was no more options.
Usage: perror [OPTIONS] [ERRORCODE [ERRORCODE...]]
-?, --help Displays this help and exits.
-I, --info Synonym for --help.
-s, --silent Only print the error message.
-v, --verbose Print error code and message (default).
(Defaults to on; use --skip-verbose to disable.)
-V, --version Displays version information and exits.
Variables (--variable-name=value)
and boolean options {FALSE|TRUE} Value (after reading options)
--------------------------------- ----------------------------------------
verbose TRUE